<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table border stripe :data="rolesList">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="closeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2===0?'':'bdtop']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="closeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      type="warning"
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      @close="closeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>
              {{scope.row}}
            </pre>-->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">搜索</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightsDialogVisible" width="50%" @close="setDialogClose">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary"  @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 获取角色列表
      rolesList: [],
      // 控制对话框的显示与否
      setRightsDialogVisible:false,
      rightsList:[],
      // 树形控制绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
      defKeys:[],
      roleId: ''
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200)
        return this.$message.error("获取角色列表失败！");
      this.rolesList = res.data;
    },
    async closeRightById(role, rightsId) {
      // 弹框提示
      const confirmResult = await this.$confirm("确认删除用户?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).catch(err => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightsId}`
      );
      if (res.meta.status !== 200) return this.$message.error("删除权限失败");
      role.children = res.data;
    },
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取权限数据
      const {data:res}=await this.$http.get('rights/tree')
      if(res.meta.status!==200) return this.$$message.error('获取权限数据失败')
      this.rightsList=res.data
      this. getLefKeys(role,this.defKeys)
      this.setRightsDialogVisible=true
    },
    getLefKeys(node,arr) {
      if(!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item=> this.getLefKeys(item,arr))
    },
    // 重置商品权限管理
    setDialogClose(){
      this.defKeys=[]
    },
    // 分配权限
    async allotRights() {
      const keys=[
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr=keys.join(',')
      const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status!==200) return this.$$message.error('分配权限失败')
      this.$message.success('分配权限成功')
      this.getRoleList()
      this.setRightsDialogVisible=false
    }
  }
};
</script>>

<style lang="less" scoped>
.bdbottom {
  border-bottom: 1px solid #cccccc;
}
.bdtop {
  border-top: 1px solid #eeeeee;
}
.el-tag {
  margin: 7px;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>